add OptionCompleteHandler, better complete option

core/src/main/java/com/taobao/arthas/core/shell/cli/CompletionUtils.java

@@ -355,4 +355,47 @@ public class CompletionUtils {
         }
         return false;
     }
+
+    public static boolean completeOptions(Completion completion, List<OptionCompleteHandler> handlers) {
+        List<CliToken> tokens = completion.lineTokens();
+        /**
+         * <pre>
+         * 比如 ` --name a`，这样子的tokens
+         * </pre>
+         */
+        if (tokens.size() >= 3) {
+            CliToken cliToken_2 = tokens.get(tokens.size() - 2);
+            CliToken cliToken_3 = tokens.get(tokens.size() - 3);
+
+            if (cliToken_2.isBlank()) {
+                String token_3 = cliToken_3.value();
+
+                for (OptionCompleteHandler handler : handlers) {
+                    if (handler.matchName(token_3)) {
+                        return handler.complete(completion);
+                    }
+                }
+            }
+        }
+
+        /**
+         * <pre>
+         * 比如 ` --name `，这样子的tokens
+         * </pre>
+         */
+        if (tokens.size() >= 2) {
+            CliToken cliToken_1 = tokens.get(tokens.size() - 1);
+            CliToken cliToken_2 = tokens.get(tokens.size() - 2);
+            if (cliToken_1.isBlank()) {
+                String token_2 = cliToken_2.value();
+                for (OptionCompleteHandler handler : handlers) {
+                    if (handler.matchName(token_2)) {
+                        return handler.complete(completion);
+                    }
+                }
+            }
+        }
+
+        return false;
+    }
 }

core/src/main/java/com/taobao/arthas/core/shell/cli/OptionCompleteHandler.java

@@ -0,0 +1,12 @@
+package com.taobao.arthas.core.shell.cli;
+
+/**
+ * 
+ * @author hengyunabc 2021-04-29
+ *
+ */
+public interface OptionCompleteHandler {
+    boolean matchName(String token);
+
+    boolean complete(Completion completion);
+}